Data from: A proximal perspective to the Eocene Drake Passage: environmental reconstruction and habitat use based on δ18O of fossil shark teeth from Seymour Island, Antarctica ...

Tectonic changes in the Southern Ocean likely triggered global cooling across the Eocene, yet the evidence for when the Drake Passage opened remains ambiguous. This climatic-tectonic change likely impacted marine ecosystems, including sharks that inhabited high-latitude regions. The fossil record co...

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Bibliographic Details
Main Authors: Larocca Conte, Gabriele, Aleksinski, Adam, Liao, Ashley, Kriwet, Jürgen, Mörs, Thomas, Trayler, Robin, Ivany, Linda, Huber, Matthew, Kim, Sora
Format: Dataset
Language:English
Published: Dryad 2024
Subjects:
FOS: Other natural sciences
Sharks
Climate modeling
Paleoecology
Eocene epoch
Drake Passage
Antarctica
Paleotemperature
Ocean temperature
Climate change
Oxygen isotope analysis
Antarc*
Seymour Island
Southern Ocean
Online Access:https://dx.doi.org/10.5061/dryad.qz612jmq2
https://datadryad.org/stash/dataset/doi:10.5061/dryad.qz612jmq2
Description
Summary:Tectonic changes in the Southern Ocean likely triggered global cooling across the Eocene, yet the evidence for when the Drake Passage opened remains ambiguous. This climatic-tectonic change likely impacted marine ecosystems, including sharks that inhabited high-latitude regions. The fossil record could provide insights into sharks’ response to global cooling over the Eocene, but paleoecological studies are few. The Middle-to-Late Eocene units on Seymour Island provide a rich, diverse fossil record, including that of sharks. We analyzed the oxygen isotope composition of phosphate from shark tooth bioapatite (δ18Op) and compared to results of co-occurring bivalves and predictions from an isotope-enabled global climate model output to investigate habitat use and environmental conditions. Bulk δ18Op values (mean 22.0 ± 1.3‰) show no significant changes through time, and variation exceeds that in simulated seasonal and regional values. Pelagic and benthic taxa exhibit similar values across units but are offset ... : See methods in Larocca Conte, G., Aleksinski, A., Liao, A., Kriwet, J., Mörs, T., Trayler, R. B., Ivany, L. C., Huber, M., Kim, S. L. (2024). A proximal perspective to the Eocene Drake Passage: environmental reconstruction and habitat use based on fossil shark teeth from Seymour Island, Antarctica. Paleoceanography and Paleoclimatology (in review). ...

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